[OWL] Roadmap batch: CI/CD, observability, testing, UX polish
CI/CD:
- Add .github/workflows/deploy.yml (lint, test, build Docker, Coolify deploy)
Observability:
- Add Pino logger (services/logger.js) — structured JSON logging
- Add Prometheus metrics (services/metrics.js) — /metrics endpoint
- Replace console.error with pino in error handler
- Track http_request_duration, http_requests_total, active_loads, total_commission
Testing:
- Add Jest config to package.json
- Add integration tests (tests/integration/app.test.js) — health, metrics, auth, 404
- Add unit tests (tests/unit/utils.test.js) — formatINR, getStatusColor, calcCommission, WhatsApp parser
- Add devDeps: jest, supertest, eslint, prettier
UX:
- Debounced search (400ms) on Loads list page
- Cache-busting asset versioning (?v=timestamp) on CSS/JS includes
- ESLint + Prettier configs
Package updates:
- Add pino, pino-http, prom-client to dependencies
- Add jest, eslint, prettier, supertest, nodemon to devDependencies
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